/*
 * Copyright 2017 StreamSets Inc.
 *
 * Licensed under the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.streamsets.datacollector.runner;

import com.streamsets.pipeline.api.Record;

import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Optional;

/**
 * Sink for catching all processed records.
 */
public class ProcessedSink {
  private Map<String, List<Record>> processedRecords;

  public ProcessedSink() {
    this.processedRecords = new LinkedHashMap<>();
  }

  public void addRecord(String stage, Record record) {
    List<Record> records = processedRecords.computeIfAbsent(stage, k -> new LinkedList<>());
    records.add(record);
  }

  public void addRecords(String stage, Collection<Record> records) {
    Collection<Record> r = processedRecords.computeIfAbsent(stage, k -> new LinkedList<>());
    r.addAll(records);
  }

  public Optional<List<Record>> getProcessedRecords(String stage) {
    return Optional.ofNullable(processedRecords.get(stage));
  }

  public void clear() {
    this.processedRecords.clear();
  }
}